Search for top-quality aftermarket Fuel Tank Caps for the Peterbilt 379 model. You can find various part styles, from locking fuel-tank caps and anti-siphon kits to vented lever-style designs. Some of the features include corrosion-resistant materials, pressure relief valves, and leak-proof seals - all engineered to withstand the demands of heavy-duty trucking and to protect your fuel tank. Remember to add some aftermarket fuel tank brackets and straps can keep your entire fuel tank storage unit protected from excessive road vibrations. Some additional parts you might consider include fuel tank accessories like fuel tank panels and bibs, or diesel fuel tank senders. It's easy to get a full aftermarket upgrade to your fuel tank storage system with our extensive lineup of parts.